Normal ?

So I’m supposed to start my period on the 2nd. It’s been regular like this for I would say the last 2 months? Before those 2 months, I used to start only around the 28th but idk what happened, my cycle just messed up. Anyway, every single period I have had, my boobs start hurting about a week before. I’m supposed to start on the 2nd and they’re not hurting at all? Is this normal?